just-animate/lib.es2015/lib/reducers/calc-configs.js

_Making Animation Simple_

import { max, min } from '../utils/math';
import { _ } from '../utils/constants';
export const calculateConfigs = (model) => {
    var maxTo = 0;
    var cursor = 0;
    var configs = model.configs;
    for (var i = 0, ilen = configs.length; i < ilen; i++) {
        var config = configs[i];
        var times = config.keyframes.map(k => k.time);
        var to = max.apply(_, times);
        var from = min.apply(_, times);
        config.to = to;
        config.from = from;
        config.duration = to - from;
        maxTo = max(to, maxTo);
        cursor = max(to + config.endDelay, cursor);
    }
    model.cursor = cursor;
    model.duration = maxTo;
};